Originally Posted by
rubiksoval
I can't think of a single race in the southeast that has a big downhill that would be worth the trouble and expense of this, so definitely don't think it'll be "common."
It's really no trouble if you have a round post. It's only about $200 to get started with a good one. Cheaper than a nice aero handlebar. Super reliable.
I have one on my Trek Stache, and was kind of ignoring it for the first few months (my first MTB purchase in 30 years). Now that I'm coaching with the HS MTB team here, I drop it before pretty much any technical descent, and sometimes for really fast corners. Droppers are brilliant.